In addition, water spinach which was grown on aquatic economic crops floating bed was harvested at regular time intervals.The total harvest weight of water spinach was 11,907 kg, which could achieve good economic benefits. A small parts of the water spinach were transplanted to crab ponds. The transplanted water spinach could not only serve as food source for crab, but also purify the water quality in crab ponds. Based on efficient utilization and recycling of natural resources and harmless discharge of wastes,the concept of circular economy was applied to agriculture system,and a recycling and utilization mode of solid waste in ecological agricultural park was realized, which could provide a good sample for sustainable development in ecological agricultural park.